X-Forwarded-Port is incorrectly determined

If the client fills out the following headers:

Header[X-Forwarded-Host]=local.somehost.com
Header[X-Forwarded-Proto]=https

And does not specify the port number in X-Forwarded-Host since it uses the the default port, then Knox automatically populates X-Forwarded-Port header field with its own local port e.g. 8443 instead of the default 443 which results in page not founds (see screenshot and log).